Your family is filled with energy. Make sure your household batteries can keep up.  The Energizer Max D-4pk Alkaline Battery is the world's first zero mercury alkaline battery.  Energizer MAX batteries deliver dependable, powerful performance that keeps going and going. Providing long life for the devices you use every day — from toys to CD players to flashlights. The latest generation of our popular alkaline batteries is exactly what you need. You never quit. Your battery shouldn’t either.